'use strict';

export default {
  player: (audioPlayer) => {
    //var audioPlayer = document.querySelector('.green-audio-player');
    var playPause = audioPlayer.querySelector('.playPause');
    var playpauseBtn = audioPlayer.querySelector('.play-pause-btn');
    var loading = audioPlayer.querySelector('.loading');
    var progress = audioPlayer.querySelector('.progress');
    var sliders = audioPlayer.querySelectorAll('.slider');
    var volumeBtn = audioPlayer.querySelector('.volume-btn');
    var volumeControls = audioPlayer.querySelector('.volume-controls');
    var volumeProgress = volumeControls.querySelector('.slider .progress');
    var player = audioPlayer.querySelector('audio');
    var currentTime = audioPlayer.querySelector('.current-time');
    var totalTime = audioPlayer.querySelector('.total-time');
    var speaker = audioPlayer.querySelector('.speaker');

    var draggableClasses = ['pin'];
    var currentlyDragged = null;

    window.addEventListener('mousedown', function(event) {

      if (!isDraggable(event.target)) return false;

      currentlyDragged = event.target;
      var handleMethod = eval(currentlyDragged.dataset.method);

      this.addEventListener('mousemove', handleMethod, false);

      window.addEventListener('mouseup', function () {
        currentlyDragged = false;
        window.removeEventListener('mousemove', handleMethod, false);
      }, false);
    });

    playpauseBtn.addEventListener('click', togglePlay);
    player.addEventListener('timeupdate', updateProgress);
    player.addEventListener('volumechange', updateVolume);
    player.addEventListener('loadedmetadata', function () {
      totalTime.textContent = formatTime(player.duration);
    });
    player.addEventListener('canplay', makePlay);
    player.addEventListener('ended', function () {
      playPause.attributes.d.value = "M18 12L0 24V0";
      player.currentTime = 0;
    });

    volumeBtn.addEventListener('click', function () {
      volumeBtn.classList.toggle('open');
      volumeControls.classList.toggle('hidden');
    });
    audioPlayer.addEventListener('blur', function () {
      if (volumeBtn.classList.contains('open') ) {
        volumeBtn.classList.toggle('open');
        volumeControls.classList.toggle('hidden');
      }
    });

    window.addEventListener('resize', directionAware);

    sliders.forEach(function (slider) {
      var pin = slider.querySelector('.pin');
      slider.addEventListener('click', eval(pin.dataset.method));
    });

    directionAware();

    function isDraggable(el) {
      var canDrag = false;
      var classes = Array.from(el.classList);
      draggableClasses.forEach(function (draggable) {
        if (classes.indexOf(draggable) !== -1) canDrag = true;
      });
      return canDrag;
    }

    function inRange(event) {
      var rangeBox = getRangeBox(event);
      var rect = rangeBox.getBoundingClientRect();
      var direction = rangeBox.dataset.direction;
      if (direction == 'horizontal') {
        var min = rangeBox.offsetLeft;
        var max = min + rangeBox.offsetWidth;
        if (event.clientX < min || event.clientX > max) return false;
      } else {
        var min = rect.top;
        var max = min + rangeBox.offsetHeight;
        if (event.clientY < min || event.clientY > max) return false;
      }
      return true;
    }

    function updateProgress() {
      var current = player.currentTime;
      var percent = current / player.duration * 100;
      progress.style.width = percent + '%';

      currentTime.textContent = formatTime(current);
    }

    function updateVolume() {
      volumeProgress.style.height = player.volume * 100 + '%';
      if (player.volume >= 0.5) {
        speaker.attributes.d.value = 'M14.667 0v2.747c3.853 1.146 6.666 4.72 6.666 8.946 0 4.227-2.813 7.787-6.666 8.934v2.76C20 22.173 24 17.4 24 11.693 24 5.987 20 1.213 14.667 0zM18 11.693c0-2.36-1.333-4.386-3.333-5.373v10.707c2-.947 3.333-2.987 3.333-5.334zm-18-4v8h5.333L12 22.36V1.027L5.333 7.693H0z';
      } else if (player.volume < 0.5 && player.volume > 0.05) {
        speaker.attributes.d.value = 'M0 7.667v8h5.333L12 22.333V1L5.333 7.667M17.333 11.373C17.333 9.013 16 6.987 14 6v10.707c2-.947 3.333-2.987 3.333-5.334z';
      } else if (player.volume <= 0.05) {
        speaker.attributes.d.value = 'M0 7.667v8h5.333L12 22.333V1L5.333 7.667';
      }
    }

    function getRangeBox(event) {
      var rangeBox = event.target;
      var el = currentlyDragged;
      if (event.type == 'click' && isDraggable(event.target)) {
        rangeBox = event.target.parentElement.parentElement;
      }
      if (event.type == 'mousemove') {
        rangeBox = el.parentElement.parentElement;
      }
      return rangeBox;
    }

    function getCoefficient(event) {
      var slider = getRangeBox(event);
      var rect = slider.getBoundingClientRect();
      var K = 0;
      if (slider.dataset.direction == 'horizontal') {

        var offsetX = event.clientX - slider.offsetLeft;
        var width = slider.clientWidth;
        K = offsetX / width;
      } else if (slider.dataset.direction == 'vertical') {

        var height = slider.clientHeight;
        var offsetY = event.clientY - rect.top;
        K = 1 - offsetY / height;
      }
      return K;
    }

    function rewind(event) {
      if (inRange(event)) {
        player.currentTime = player.duration * getCoefficient(event);
      }
    }

    function changeVolume(event) {
      if (inRange(event)) {
        player.volume = getCoefficient(event);
      }
    }

    function formatTime(time) {
      var min = Math.floor(time / 60);
      var sec = Math.floor(time % 60);
      return min + ':' + (sec < 10 ? '0' + sec : sec);
    }

    function togglePlay() {
      if (player.paused) {
        playPause.attributes.d.value = "M0 0h6v24H0zM12 0h6v24h-6z";
        player.play();
      } else {
        playPause.attributes.d.value = "M18 12L0 24V0";
        player.pause();
      }
    }

    function makePlay() {
      playpauseBtn.style.display = 'block';
      loading.style.display = 'none';
    }

    function directionAware() {
      if (window.innerHeight < 250) {
        volumeControls.style.bottom = '-54px';
        volumeControls.style.left = '54px';
      } else if (audioPlayer.offsetTop < 154) {
        volumeControls.style.bottom = '-164px';
        volumeControls.style.left = '-3px';
      } else {
        volumeControls.style.bottom = '52px';
        volumeControls.style.left = '-3px';
      }
    }
  }
}



